Pole-changer.



lUNITED STATES VPATENT OFFICE.

WALTER II. COTTON, OF CHICAGO, ILLIXOIS, ASSIGNOR TO THE ADAMSRSL WESTLAKE COMPANY, A CORPORATION OF ILLINOIS.

POLE-CHANGER.

Application filed August,

To all whom/t may concern:

vBe it known that I, WALTER H. CorroN, a citizen oi' the United States, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Pole-Changers, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a partthereof.

. at its endsja vpair of mdiallygprojecting contact-pieces 29, 30 and 31,132.

The invention relates to that class of pole changers 1 which are serviceable in connection with reversible dynanios; its object being to provide a simple and eh' Vtric,4 generator and circuit 'being diag'mrnmatically.

shown; Fig. 2 is a sectional view of the pole changer on -the line 2-2 of 1 Fig. 3 is a detail sectional view ofthe pole changer on the line 3-3 of Fig. 2; Fig. 4 is ladiagrammatic view of the .device showing a different circuit arrangement.

vA dynamo is'conventionally represented at 10 and its field at 11 and as being in series with-the lamp circuit 12.

' -The pole changer comprises a base-plate 13, having apertured lugs 1 4 and 15 to provide for securing it tov a proper support. The plate 13 is shown as circular in form, and securedat its'margin, and suitably insulated, are a pair of oppositely-disposed segmental contactplates 16, 17, and intermedia-,te thereof, and equi-distant therefrom, two pairs of oppositely-disposed contact-plates 18,' 19 and 20,21, the members of each pair bei-iig insulated each from the other but each being con- `nected to a Amember of the opposite pair, a strap 22 uniting the plates 18 and 20, and a strap 23 uniting the plates 19 and 2l. i i

. The plate 13 is provided with a hub 24, within which is fixed a shaft 25. Upon the .outer end' of this shaft 'is rotatably mounted a'disk 26,

carrying a pair of segmental plates 27, 28, each having The contact-pieces 29,32, are constantly in engagement with the plates 16 and 17, the latter being of a width equal to tlierange o movement o f the shiftableparts. Each of the other contact-pieces 30 and 31 alternately engage one 0i each pair of theintermediate plates 18, 19 and 20, 21. The plate 26 carries a pin 33, which projects through an elongated aperture 34 in the plate 13 andis engaged by an oscillating yoke 35, pivoted on a stud 36, projecting from the rear face oi the plate 13. The yoke 35 is provided .'with a finger 37, which rides upon the periphery of a disk'38, mounted with a worin-wheel 39 on tl1e`- shaft Specification of lLetters Patent.

1906. Serial No. 329,407.

centrally apertured I Patented Oct. 22, 1907.

l power-driven shaft 41, which is actuated from the armature shaft of the dynamo 10, and hence is turned in either direction. The diskV 38 has a pocket 42 set ting in from its periphery, into which the finger 37 falls at each rolt-ation of the disk, the width of the yoke 35 engaging the pin 33 being sulicien't to afllow the finger to drop into this recess. i

With the]v parts in therposition shown' in Fig. 3, so long as thexdisk 38 continues to turn to the leit, that is,` reverse of a clockwise movement, the switch remains undisturbed in the position shown in Fig. 1, the `finger 37 dropping into the recess 42 an'd immediately rising therefrom as the disk proceeds. Upon a reversal of direction oi the disk 38, the finger 37 enters the recess 42 andis carried to the right, past the perpendicular, when it again rides up ontotheperiphery of the disk.

the pin 33 with it and shifts the plate 26, bringing the plate 28 into contact with the plate 1S and the plate 27 with the plate 21. The next reversal of direction of rotation ofthe shait'38 will restore the switch to the positin shown.

As represented in Fig. 1, the circuit is traced from the positive brush of the dynamo 10 to the contactplate 18, `through the strap 22 to the contact-plate 20, through the .plate 27 to the contact-plate 16, through the line 43 to the field circuit 11, thence through the line 44 to the plate 17 and through the plates 28 and 19 .to'the lightcircuit 12, and thence to the negative brush of the dynamo. Upon the reversal oi, the dynamo the polarity ot the brushes is changed and the switch or pole changer is'. shifted. The Vpositive leadvis now directly from the dynamo to the lamp circuit' 12 through the line45, thence through the plate 19, the strap 23, the plates 21, 27 and16the line 43, the field to the dynamo.

In Fig. 4 the same form of pole changer is diagrammatically represented, there being shown a storage battery, the light battery and field circuits being served Vfrornthe same dynamo and being arranged in parallel. The circuit is led from the dynamo through the lines 47, 4 8L'to the pole changer, and from the latter to the lines 49, 50. 'Branches 51, 52,^ connec't with the storage battery 53, branches 54, 55, lead tothe lamp circuit 56, and branches `57 58,1:onnectv with the iield 1 1.4

I claim as my invention- 11 In a pole changer', 2in combination, an oscillatable switch. a-reversible rotatable wheelhaving a recess in its periphery. and an oscillatahle member having a lost motion connection with Vthe Switch and having a point bearing on the wheel and adapted to enter the recess.

2. In a pole changer, in combination, an oscillatable switch, a reversible rotatable wheel haring a recess 1n its periphery, an oscillatable yoke .engaging a stud on the switch and having,r the arms of the yoke spaced apart more Upon thus being moved to the right, the yoke carriesA rhanthe' diameter of the stud, maeA 'flngr projecting free] the yoke apdmdihg on the wheel. 'y 3. In a pole changer',- lncombnatdn, a xed plaie,v two 'f pairs of dlamefrcally-disposed contact [hazes mounted ln' v s'uchl plate, vtwo vdlfurxetreal 'contact` plates intermediate ofsueh pairs of plateseich of a. Width equalto the comblned width'pf tlle two members of eachpair of plates, electricfconduetol'sy permanently connecting opposed membersof the two pairs of plates, al: `osclllzptable plate, a

pair ofvcontactjlartes carried thereby andeuch adapted" 10 no engage one'of the wider Contact. plates with either membex' 0f one of the pil-irs of plates, and mea/ns Afor: os'eillating 

